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Multipoint linkage analysis in Menkes disease
T Tønnesen1, A Petterson, T A Kruse
1John F. Kennedy Institute, Glostrup, Denmark.
American Journal of Human Genetics
|May 1, 1992
Summary
Researchers mapped the Menkes disease gene using DNA markers in affected families. The gene is located in the Xq12 to Xq13.3 region of the X chromosome.
Area of Science:
- Genetics
- Molecular Biology
- Human Disease Research
Background:
- Menkes disease is a rare X-linked genetic disorder affecting copper metabolism.
- Accurate gene localization is crucial for understanding disease mechanisms and developing diagnostics.
Purpose of the Study:
- To precisely map the locus of the Menkes disease gene on the X chromosome.
- To identify specific DNA markers linked to the Menkes disease gene.
Main Methods:
- Performed linkage analysis in 11 families with X-linked Menkes disease.
- Utilized 11 polymorphic DNA markers and analyzed 40 informative meioses.
- Conducted two-point and multilocus linkage analyses to determine gene location.
Main Results:
- High lod scores indicated linkage to the pericentromeric region with markers DXS146, DXS1, PGK1, and DXS3.
- Multilocus analysis pinpointed the most likely location between markers DXS159 and DXYS1X.
- Recombinant X chromosome analysis further refined the Menkes locus to be between DXS159 and DXS94.
Conclusions:
- The Menkes disease locus is located proximal to DXYS1X.
- The gene for Menkes disease is situated in the Xq12 to Xq13.3 region.
- These findings refine the genetic map for X-linked Menkes disease.